Method for enhancing petroleum pollution removing effect of seawater

Abstract

The invention belongs to the technical field of environmental pollution, in particular to a method for enhancing the petroleum pollution removing effect of seawater. The method comprises the following steps of: culturing high-yield biological surfactant bacteria and efficient petroleum degrading bacteria cultured and screened in a biological trickling filter in a mixed way by taking chitosan as a carrier, and performing freeze drying to obtain a microbial agent (bacterial powder); and treating petroleum pollution simulation seawater with the bacterial powder, wherein three days later, the initial concentration is 1,700 mg / L, the salinity is 3 percent, the removing rate of total petroleum hydrocarbon in the simulation seawater is over 95 percent, and the total petroleum hydrocarbon concentration in the seawater is lower than the primary standard in the Effluent Standards for Oil-Bearing Waste Water from Offshore Petroleum Development Industry. In the method, chitosan is taken as a carrier, so that microorganisms better float on the sea level and are tightly contacted with pollutants on the surface of seawater, and the petroleum removing rate is increased; moreover, the treatment cost of oil stains is reduced greatly; and the production process of the bacterial powder is safe, the application method is simple, and secondary environmental pollution is prevented.

Description

technical field

[0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for improving the effect of removing oil pollution in seawater. Background technique

[0002] With the continuous and rapid development of my country's economy, the dependence on oil has been increasing. Sea transportation is the main channel for my country's oil imports. At the same time, factors such as offshore oil exploitation have caused more and more serious oil pollution in the ocean. The environmental protection of the ocean is becoming the focus of attention of all countries in the world.

[0003] The biodegradation of petroleum pollutants refers to a controlled or spontaneous process that uses biological metabolic activities to catalyze the degradation of oil pollutants, thereby removing or eliminating environmental petroleum pollution. Compared with physical and chemical methods, the biological method has great advantages, and has...